On which of the following amateur bands is long-path propagation most frequent?
The correct answer is B: 40 meters and 20 meters. On which of the following amateur bands is long-path propagation most frequent is 40 meters and 20 meters. Long-path propagation is most common on these bands. For amateur radio operators, this is important for long-path operation. Understanding this helps when operating long-path.
Exam Tip
Long-path most frequent bands = 40 meters and 20 meters. Think 'L'ong-'P'ath = '4'0m and '2'0m. Long-path propagation is most common on 40m and 20m. Not 160m/80m, not 10m/6m, not 6m/2m - just 40m and 20m.
Memory Aid
"Long-path most frequent bands = 40 meters and 20 meters. Think 'L'ong-'P'ath = '4'0m/'2'0m. Long-path propagation is most common on 40m and 20m. Important for long-path operation."
Real-World Application
Long-path propagation: It's most frequent on 40 meters and 20 meters. These bands have the right combination of ionospheric characteristics and frequency to support long-path propagation regularly. Other bands (160m/80m, 10m/6m, 6m/2m) have long-path less frequently. This is where long-path is most frequent - 40m and 20m.
Key Concepts
Why Other Options Are Wrong
Option A: Incorrect. 160m and 80m aren't where long-path is most frequent - 40m and 20m are. 160m/80m isn't the answer.
Option C: Incorrect. 10m and 6m aren't where long-path is most frequent - 40m and 20m are. 10m/6m isn't the answer.
Option D: Incorrect. 6m and 2m aren't where long-path is most frequent - 40m and 20m are. 6m/2m isn't the answer.
题目解析
The correct answer is B: 40 meters and 20 meters. On which of the following amateur bands is long-path propagation most frequent is 40 meters and 20 meters. Long-path propagation is most common on these bands. For amateur radio operators, this is important for long-path operation. Understanding this helps when operating long-path.
考试技巧
Long-path most frequent bands = 40 meters and 20 meters. Think 'L'ong-'P'ath = '4'0m and '2'0m. Long-path propagation is most common on 40m and 20m. Not 160m/80m, not 10m/6m, not 6m/2m - just 40m and 20m.
记忆口诀
Long-path most frequent bands = 40 meters and 20 meters. Think 'L'ong-'P'ath = '4'0m/'2'0m. Long-path propagation is most common on 40m and 20m. Important for long-path operation.
实际应用示例
Long-path propagation: It's most frequent on 40 meters and 20 meters. These bands have the right combination of ionospheric characteristics and frequency to support long-path propagation regularly. Other bands (160m/80m, 10m/6m, 6m/2m) have long-path less frequently. This is where long-path is most frequent - 40m and 20m.
错误选项分析
Option A: Incorrect. 160m and 80m aren't where long-path is most frequent - 40m and 20m are. 160m/80m isn't the answer. Option C: Incorrect. 10m and 6m aren't where long-path is most frequent - 40m and 20m are. 10m/6m isn't the answer. Option D: Incorrect. 6m and 2m aren't where long-path is most frequent - 40m and 20m are. 6m/2m isn't the answer.
知识点
Long-path propagation, Amateur bands, 40 meters and 20 meters, Long-path frequency
Verified Content
Question from official FCC Extra Class question pool. Explanation reviewed by licensed amateur radio operators.